1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21182c2d1a217a69b4036757a6be094ca402cc1bce7ca8bf8a12e37df96869c2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfb7e40d-eb1a-487f-9262-ac2359dbfc15.json and https://artists.proofprofile.net/proofs/artist/dfb7e40d-eb1a-487f-9262-ac2359dbfc15.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4ce40a355383d474994c0c5c1ac8750a4de9378f1cc4ecd3f13714365f7711. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551155010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc098fa28b1b645368e5384b305115950b490acddd24ed32b98df19f83c71cb7a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551052242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5540c975422760041d2750dbb9f9f05c9491090b7bb0630f6cd7e7e7ade87fb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec38a6300322896308847c1eedbb6b1ef5c986b8d04e4ff45d6aa0d64ecba92. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5f38606424ca3948074fb2af7fa65403fcfbe651bf2de1b4aa6d9804082ab2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7881e9e0575ccbedd7d9ed26e1d834a5ca1d055406641c0221ee465371109e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840257eb3765e4b7115a1a1b3b453abe8bfeccff6cd755746c2cc5f15cdf6b02. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551051722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8be6fb43aa63e7c7edf271dcdcd77a64fe4e6119dd1ab4a2f9791fbb43e086c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575ab2ca4d036d126c334e82760bf6da938900b82e24b380972dec2bc18afa63. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e7633c9df259a64d7ac52b9736a250867881ee86c51aa2b3cf1d6f68a33153. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551264825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883a374512249ccbb576a58603ff2a8d1635a2fb4085e5e92eb9ed7837c5ffb0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbe0956f7c857ea6fc3f9a6893a30f1df1cd0efcb5d19ad925ab18238a3e197. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779318032295a2fa90770288952e52664dd6b7dc99668370e21968ce0a059f6b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9297111d6f1173b23de93d915ae9a3655025c9886c09f88a44ca1d79248d4159. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf692d4620a439c32fce5454f127e19ddf765a0d1a7ef7bdc7d6645b1a2c03781. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0080d144dab3179cfe57ead556c3ca1e9796604108e5a93fa876c40037d1076. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551264826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e131e256d116dcb5243735f0124d051def4785f4c4d395989593360cc803386. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551153211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c4c75fe88bbc9c501c32b114de7c70a91449c18dcd429d791568a03ceb21ea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551052214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e83bb7ed5bc37701c67a9fca1193ade6d4fb1e24c51eece0bee46c9b9897ee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF551257366.